Primjena simuliranog Sunčevog zračenja i vodikovog peroksida za uklanjanje ksenobiotika iz vodenih otopina

undergraduate thesis

• Title (english): Application of simulated solar radiation and hydrogen peroxide to remove xenobiotics from aqueous solutions
• Author: Anamaria Maslač
• Mentor: Danijela Ašperger (mentor)
• Committee member: Danijela Ašperger (predsjednik povjerenstva)
• Committee member: Davor Dolar (član povjerenstva)
• Committee member: Svjetlana Krištafor (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2022-09-20, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry

Abstract

Ksenobiotike se može definirati kao organske i anorganske spojeve koji su strani organizmu. Imaju negativan utjecaj, ne samo na ljudsko zdravlje, već i na čitav okoliš. Jedni od najupotrebljivanijih ksenobiotika su pesticidi, a definirani su kao organski spojevi namijenjeni suzbijanju štetnih organizama. Prekomjerna uporaba pesticida ima negativan utjecaj na cijeli ekosustav stoga je važno pronaći način kako ih ukloniti iz okoliša i na taj način poboljšati kvalitetu biosfere. Kvantifikacija i detekcija ksenobiotika, odnosno pesticida acetamiprida, klotianidina i tiakloprida u uzorcima vode provedena je tekućinskom kromatografijom visoke djelotvornosti. Razgradnja navedenih ksenobiotika se nastojala potaknuti mehaničkim miješanjem u prisustvu vodikovog peroksida, ali i uz umjetno Sunčevo zračenje. Mehaničkim miješanjem u prisustvu vodikovog peroksida moguće je uočiti trenutne rezultate pri čemu daljnjim miješanjem ne dolazi do pomaka koncentracije ksenobiotika u otopini. Daljnjim provođenjem simuliranih uvjeta, rezultati navode kako je za potpunu razgradnju bilo kojeg ksenobiotika potrebno Sunčevo zračenje, a sama kvaliteta i brzina uklanjanja ovisi o drugim parametrima otopine kao što su pH-vrijednost i koncentracija vodikovog peroksida. Bitno je naglasiti da će pri svim uvjetima ksenobiotik biti uklonjen, a jedino na što će utjecati reacijski uvjeti je brzina uklanjanja. Rezultati su pokazali kako da su se ksenobiotici najprije uklonili u kiseloj otopini, međutim, treba voditi računa o očuvanju okoliša i prekomjernom ispuštanju ne samo kiselina već i vodikovog peroksida.

Abstract (english)

Xenobiotics can be defined as organic and inorganic compounds that are unknown to the organism. They have a negative impact, not just on human health, but on the entire environment. One of the most used xenobiotics are pesticides. They are defined as organic compounds that are used for controlling harmful organisms. Excessive use of pesticides has a negative impact on the entire ecosystem, so it is important to find a way to remove them from the environment and thus improve the quality of the biosphere. Quantification and detection of xenobiotics (pesticides) acetamiprid, clothianidin and thiacloprid in the samples was performed by high performance liquid chromatography . The decomposition of the mentioned xenobiotics was stimulated by mechanical mixing in the presence of hydrogen peroxide, but also with simulated solar radiation. Xenobiotics that were mechanically mixed in the presence of hydrogen peroxide were partially decomposed, but their concentracion stayed the same throughout the experiment. Furthermore, the results indicate that solar radiation is necessary for the complete decomposition of any xenobiotic. The quality and speed of removal depends on the other parameters, such as the pH-value and the concentration of hydrogen peroxide. It needs to be said that all the xenobiotics are removed no matter what the concentration of hydrogen peroxide or pH-value, but it does matter when it comes to speed of the removal. Results are showing that xenobiotics are first removed from an acidic solution, however, it's not environmentally acceptable to produce too much acid or hydrogen peroxide.

• Keywords: ksenobiotici; pesticidi; vodikov peroksid; fotoliza
• Keywords (english): xenobiotics; pesticides; hydrogen peroxide; photolysis
• Language: croatian
• URN:NBN: urn:nbn:hr:149:276660
• Study programme: Title: Applied Chemistry - Undergraduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry; Course: Environmental chemistry and green technologies; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-03-06 13:41:16